RESISTIVITY SURVEY TO LOCATE HOT WATER RESERVES AT FILWOHA, ADDIS ABABA

Abstract

Hot springs and boreholes are the sources of the hot water for
the public bath at Filwoha, in Addis Ababa. Most of the boreholes were drilled without ample information about the subsurface. Tho shortage of such information has limited the full utilisation of the hot water potential in Filwoha. To overcome this limitation a resistivity survey was conducted in the area, using a SchJumberger array with two different electrode separations. Two low resistivity zones were delineated. one around the Addis Ababa Stadium and tbe other near tbe Ministry of Foreign Affairs. Using geophysical, geological and geochemical
iDformation a preliminary conclusion has boon drawn that the low resistivity zones are due to water that escape through the major Pitwoha Fault. On the basis of these results. additional geophysical survey and two test-drilling sites are recommended and further suggestions are given to reserve the area for a recreation centre.
Key words/phrases: Fllwoha